examples/frauddetect/src/main/java/org/apache/apex/examples/frauddetect/SlidingWindowSumObject.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.apex.examples.frauddetect;


import org.apache.apex.malhar.lib.multiwindow.SimpleMovingAverageObject;
import org.apache.commons.lang.mutable.MutableDouble;

/**
 * State object for sliding window sum
 *
 * @since 0.9.0
 */
public class SlidingWindowSumObject extends SimpleMovingAverageObject
{

  MutableDouble sum = new MutableDouble(0);

  public void add(Number n)
  {
    sum.add(n);
  }

  @Override
  public double getSum()
  {
    return sum.doubleValue();
  }

  @Override
  public void clear()
  {
    sum.setValue(0);
  }

}